Determination of selected micro and macronutrients in sugarcane growing soils at Kakamega North District, Kenya

Akenga, Preston; Salim, Ali Mohammed; Onditi, Anam; Yusuf, A.A.; Waudo, Walyambillah

doi:10.9790/5736-07713441

Cited by 14 publications

(6 citation statements)

References 2 publications

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“…Akengu et al . 62 also reported lower values for sugarcane fields in Kakamega county, towards the centre of this studies locations in Kenya at 235–891, 0.4–11, 144–636, 3–24 mg kg −1 for Ca, Cu, Fe and Zn, respectively. It is likely that the lower values in these comparative studies resulted from differing techniques that did not provide a ‘true’ elemental measurement, such as aqua regia for partial dissolutions, as opposed to the use of HF/HNO 3 /HClO 4 in this study for a ‘total’ dissolution of trace and major elements.…”

Section: Discussionsupporting

confidence: 51%

Source apportionment of micronutrients in the diets of Kilimanjaro,Tanzania and Counties of Western Kenya

Watts

Middleton

Marriott

et al. 2019

Sci Rep

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Soil, water and food supply composition data have been combined to primarily estimate micronutrient intakes and subsequent risk of deficiencies in each of the regions studied by generating new data to supplement and update existing food balance sheets. These data capture environmental influences, such as soil chemistry and the drinking water sources to provide spatially resolved crop and drinking water composition data, where combined information is currently limited, to better inform intervention strategies to target micronutrient deficiencies. Approximately 1500 crop samples were analysed, representing 86 food items across 50 sites in Tanzania in 2013 and >230 sites in Western Kenya between 2014 and 2018. Samples were analysed by ICP-MS for 58 elements, with this paper focussing on calcium (Ca), copper (Cu), iron (Fe), magnesium (Mg), selenium (Se), iodine (I), zinc (Zn) and molybdenum (Mo). In general, micronutrient supply from food groups was higher from Kilimanjaro,Tanzania than Counties in Western Kenya, albeit from a smaller sample. For both countries leafy vegetable and vegetable food groups consistently contained higher median micronutrient concentrations compared to other plant based food groups. Overall, calculated deficiency rates were <1% for Cu and Mo and close to or >90% for Ca, Zn and I in both countries. For Mg, a slightly lower risk of deficiency was calculated for Tanzania at 0 to 1% across simplified soil classifications and for female/males, compared to 3 to 20% for Kenya. A significant difference was observed for Se, where a 3 to 28% risk of deficiency was calculated for Tanzania compared to 93 to 100% in Kenya. Overall, 11 soil predictor variables, including pH and organic matter accounted for a small proportion of the variance in the elemental concentration of food. Tanzanian drinking water presented several opportunities for delivering greater than 10% of the estimated average requirement (EAR) for micronutrients. For example, 1 to 56% of the EAR for I and up to 10% for Se or 37% for Zn could be contributed via drinking water.

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Section: Discussionsupporting

confidence: 51%

Source apportionment of micronutrients in the diets of Kilimanjaro,Tanzania and Counties of Western Kenya

Watts

Middleton

Marriott

et al. 2019

Sci Rep

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“…In post monsoon season, the calcium levels are increased in site I, site III and site IV but decreased in site II and site V when compared to pre monsoon season. The obtained calcium concentration levels are within the permissible limits compared to literature value [13] Obtained mean concentration of iron in pre monsoon season is 150.38 mg/kg and post monsoon season is 268.22 mg/kg. The iron concentration levels increased in post monsoon season when compared to pre monsoon season.…”

Section: Metal Concentration In Soilsupporting

confidence: 66%

Seasonal Variation of Trace and Heavy Metals in Agricultural Soils around Tummalapalle Uranium Mining Site

Reddy¹,

Reddy²,

Reddy³

2018

Asian J. Chem.

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INTRODUCTIONSoils may become contaminated by the accumulation of heavy metals and metalloids through emissions from the rapidly expanding industrial areas, mine tailings, disposal of high metal wastes, leaded gasoline and paints, land application of fertilizers, animal manures, sewage sludge, pesticides, wastewater irrigation, coal combustion residues, spillage of petrochemicals and atmospheric deposition [1,2]. The intensification of mining operations, crushing, washing and smelting of the ore were performed close to the mining site and the amount of mining residues deposited in soils in and around the mining site. The heaviest deposition of airborne metal particles occurs in the vicinity of mines, smelters and metal processing/heavy engineering works, which constitute the main emission sources. But many of the particles are very fine that they can be carried to enormous distances by the wind [3].Heavy metal contamination of soil may pose risks and hazards to humans and the ecosystem through direct ingestion or contact with contaminated soil, the food chain (soil-planthuman or soil-plant-animal-human), drinking of contaminated ground water, reduction in food quality (safety and marketability) via phytotoxicity, reduction in land usability for agricultural production causing food insecurity and land tenure problems [4].

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“…Unlike K + , Ca 2+ is also involved in the formation, composition, and stabilization of cell walls [ 27 ]. Both K + and Ca 2+ are the cations involved in more plant functions and are indispensable in plant nutrition, but K + limits plant growth more frequently than Ca 2+ [ 28 , 29 ].…”

Section: Stable Cation In Solution Necessary For Plant Functional mentioning

confidence: 99%

Potassium Control of Plant Functions: Ecological and Agricultural Implications

Sardans

Peñuelas

2021

Plants

197

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Potassium, mostly as a cation (K+), together with calcium (Ca2+) are the most abundant inorganic chemicals in plant cellular media, but they are rarely discussed. K+ is not a component of molecular or macromolecular plant structures, thus it is more difficult to link it to concrete metabolic pathways than nitrogen or phosphorus. Over the last two decades, many studies have reported on the role of K+ in several physiological functions, including controlling cellular growth and wood formation, xylem–phloem water content and movement, nutrient and metabolite transport, and stress responses. In this paper, we present an overview of contemporary findings associating K+ with various plant functions, emphasizing plant-mediated responses to environmental abiotic and biotic shifts and stresses by controlling transmembrane potentials and water, nutrient, and metabolite transport. These essential roles of K+ account for its high concentrations in the most active plant organs, such as leaves, and are consistent with the increasing number of ecological and agricultural studies that report K+ as a key element in the function and structure of terrestrial ecosystems, crop production, and global food security. We synthesized these roles from an integrated perspective, considering the metabolic and physiological functions of individual plants and their complex roles in terrestrial ecosystem functions and food security within the current context of ongoing global change. Thus, we provide a bridge between studies of K+ at the plant and ecological levels to ultimately claim that K+ should be considered at least at a level similar to N and P in terrestrial ecological studies.

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Determination of selected micro and macronutrients in sugarcane growing soils at Kakamega North District, Kenya

Cited by 14 publications

References 2 publications

Source apportionment of micronutrients in the diets of Kilimanjaro,Tanzania and Counties of Western Kenya

Source apportionment of micronutrients in the diets of Kilimanjaro,Tanzania and Counties of Western Kenya

Seasonal Variation of Trace and Heavy Metals in Agricultural Soils around Tummalapalle Uranium Mining Site

Potassium Control of Plant Functions: Ecological and Agricultural Implications

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